Hinge pin



FIG. 1 is an isometric view of an hinge pin showing my new design;

FIG. 2 is a side elevational view thereof, the opposite side being a mirror image thereof;

FIG. 3 is a top plan view thereof, the bottom view being a mirror image thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a rear elevational view thereof.

The broken lines represent environment that forms no part of the claim. 

CLAIM The ornamental design for a hinge pin, as shown and described. 